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Originally Posted by Alexander Turcic
It would be cool if you could test power consumption with books stored in internal memory vs. books stored in external memory such as an SD card. We have numerous reports that the latter uses considerably more power per page turn.
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The measurements were taken with books in internal memory, no memory card inserted.
Hmm, unfortunately, I don't have a SD card or MemoryStick here now. I'll be able to test it next week thursday or friday.
From what I know about the usual current consumption of SD cards, I estimate a memory card would raise the page turn current by about 40-60mA.
Some more info: When charging was complete, current consumption from the lab power supply with a book page on the display was shown as zero (lab ps ampmeter, not sure if it was really zero, lets say: below 1mA). Page turn current peaked at about 220mA (drawn from external power supply, no mem card).
Varying the external supply voltage from 4.8V...5.2V didn't make a difference in current consumption.
^_^